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更新 2022-09-03
科目英语
题型单选题
难度中等
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挑错有奖

It’s not easy for the expert to ______ pig flu.in humans from regular human seasonal influenza.

A．distinguish

B．separate

C．identify

D．recognize

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相关试题

If you are traveling the customs are really foreign to your own, please do as the Romans do.

A．in which

B．what

C．when

D．where

题型：未知
难度：未知

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Isn't it time you got down to the papers?

A．mark

B．be marked

C．being marked

D．marking

题型：未知
难度：未知

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I just wonder ____ that makes him so excited.

A．why it does

B．what he does

C．how it is

D．what it is

题型：未知
难度：未知

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Some people fear that ________ air pollution may bring about changes in _______ weather around the world.

A．/; the

B．the; /

C．an; the

D．the; a

题型：未知
难度：未知

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The doctor must be _______ 24 hours a day, 7 days a week in the boarding school.

A．on call

B．by hand

C．in sight

D．on spot

题型：未知
难度：未知

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